class tortoise:
    bodyColor = "绿色"
    _footNum = 4
    weight = 10
    hasShell = True

    #会爬
    def crawl(self):
        print("乌龟会爬")
    #会吃东西
    def eat(self):
        print("乌龟吃东西")

class man():
    def __init__(self,age=None):
        self.age = age
if __name__ == '__main__':
    t1 = tortoise()
    print(t1.bodyColor)
    print(t1._footNum)
    # t1._sleep()
    m = man()
    m.age = 1